Commit-ID: 72ec61a9e8347375e37c05e23511173d8451c3d4 Gitweb: http://git.kernel.org/tip/72ec61a9e8347375e37c05e23511173d8451c3d4 Author: Yong Zhang <yong.zhang0@xxxxxxxxx> AuthorDate: Tue, 29 May 2012 15:16:04 +0800 Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx> CommitDate: Tue, 5 Jun 2012 17:27:13 +0200 POWERPC: Smp: remove call to ipi_call_lock()/ipi_call_unlock() ipi_call_lock/unlock() lock resp. unlock call_function.lock. This lock protects only the call_function data structure itself, but it's completely unrelated to cpu_online_mask. The mask to which the IPIs are sent is calculated before call_function.lock is taken in smp_call_function_many(), so the locking around set_cpu_online() is pointless and can be removed. [ tglx: Massaged changelog ] Signed-off-by: Yong Zhang <yong.zhang0@xxxxxxxxx> Cc: ralf@xxxxxxxxxxxxxx Cc: sshtylyov@xxxxxxxxxx Cc: david.daney@xxxxxxxxxx Cc: nikunj@xxxxxxxxxxxxxxxxxx Cc: paulmck@xxxxxxxxxxxxxxxxxx Cc: axboe@xxxxxxxxx Cc: peterz@xxxxxxxxxxxxx Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> Cc: Paul Mackerras <paulus@xxxxxxxxx> Cc: linuxppc-dev@xxxxxxxxxxxxxxxx Link: http://lkml.kernel.org/r/1338275765-3217-10-git-send-email-yong.zhang0@xxxxxxxxx Acked-by: Srivatsa S. Bhat <srivatsa.bhat@xxxxxxxxxxxxxxxxxx> Acked-by: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> --- arch/powerpc/kernel/smp.c | 2 -- 1 files changed, 0 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c index e4cb343..e1417c4 100644 --- a/arch/powerpc/kernel/smp.c +++ b/arch/powerpc/kernel/smp.c @@ -571,7 +571,6 @@ void __devinit start_secondary(void *unused) if (system_state == SYSTEM_RUNNING) vdso_data->processorCount++; #endif - ipi_call_lock(); notify_cpu_starting(cpu); set_cpu_online(cpu, true); /* Update sibling maps */ @@ -601,7 +600,6 @@ void __devinit start_secondary(void *unused) of_node_put(np); } of_node_put(l2_cache); - ipi_call_unlock(); local_irq_enable(); -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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